L-carnitine

A form of carnitine, which is a substance made in the muscles and liver. It can be given as a supplement to prevent and treat carnitine deficiency in patients who are receiving chemotherapy for cancer or undergoing dialysis for kidney disease. Also called levocarnitine.

A free amino acid. Believed to help the body protect itself against diseases of the liver, kidneys, cardiovascular system and muscles. It has shown some beneficial effects for treating diabetes, and there is evidence that L-carnitine helps build muscle tissue